RAS – A system for monitoring and controlling street lights

RAS – A system for monitoring and controlling street lights

System for remote monitoring and management of individual or a group of lighting points enables a more rational exploitation of street lighting and lighting of roads and intersections. The system is designed to be centrally controllable. Through the graphic interface, system operator is capable to define switching times of a single lighting point or a group of lighting points and to regulate luminous flux.

The system offers:

– Management

  • Programmable of/off switching of a single lighting point or a group of lighting points
  • Reduction of luminous flux

– Monitoring

  • Status presentation of a single lighting point or a group of lighting points
  • Status presentation of the lighting network

RAS functions (Depends on the instaled BALLAST TYPE)

Non-dimmable electromagnetic ballast:

  • Programmable on/off switching of existing lighting points,
  • Status presentation of a single lighting point or a group of lighting points.

Two-step dimmable electromagnetic ballast:

  • Programmable on/off switching of existing lighting points,
  • Status presentation of a single lighting point or a group of lighting points,
  • Luminous flux reduction from 100% – 50%.

Continuously dimmable electronic ballast:

  • Programmable on/off switching of existing lighting points,
  • Status presentation of a single lighting point or a group of lighting points,
  • Continuous regulation of luminus flux from 30% – 100%

Control center

Architecture – Server (database, server and user applications)

Functions:

  • Realisation of the user interface,
  • Configuring the system,
  • Remote programming of the concentrator:
  • Programming parameters for lighting,
  • Setting time and date on concentrators.

UMS remote management:

  • Turning lights on/off
  • Turning group of lighting points on/off

Supervision of concentrator and UMS:

  • Automatically collecting and storing data on the work,
  • Reporting on network status and keeping record of defective lamps,
  • System statistics,
  • System monitoring,
  • Recording of all events, alarms, creating reports…

Concentrator

Architecture – Communication controler;  PLC modem; GPRS modem.
Functions

Autonomous management of the route:

  • Independent automatic connection and disconnection,
  • Power control,
  • Status reading along the route.

Communication with the server:

  • Calendar, time,
  • Scenario in which lighting is working,
  • Download the collected data from the route.
  • Communication with PLC modems,
  • Reading the electric meter.

Interface:

  • RS485/RS232 to a meter of the measuring group,
  • RS232 to a host computer,
  • 100/10Mb/s Ethernet.

UMS – Lighting management module

Architecture – The control block; the switching block; PLC modem; Ballast.

PLC
Turning lighting on/off:

  • With a non-dimmable electromagnetic ballast,
  • With a Two-step dimmable electromagnetic ballast,
  • With a ontinuously dimmable electronic ballast,
  • Regulation of the level of luminous flux,
  • Measurement of the power.

Electronic Ballast
Start-up (igniting lights);
Current limitation;
Power factor correction (0.99).
Communication features

GPRS

  • IP communication KC – concentrator,
  • Possible upgrade of Ethernet,
  • GPRS modems DKTSky 200 (shipped over 15,000 units),
  • Quad-band 850/900/1800/1900 MHz,
  • GPRS multi-slot class 10,
  • Receive up to 57.6 Kb / s, transmission up to 28.8 Kb / s,
  • Sensitivity of – 107 dBm
  • Extended temperature range from -30 ° C to +80 ° C,
  • Output power: Class 4 (2W) Class 1 (1W).

PLC

  • YITRAN IT 800D modem chip,
  • DCSK modulation of spread spectrum,
  • CENELEC A / B,
  • CSMA / CA with specific back-off algorithm,
  • FEC and CRC-16,
  • Communication speed up to 2.5 Mb/s,
  • Extended temperature range from -40 ° C to +85 ° C,
  • 3W peak power,
  • Safe and proven solution in practice.

Data transmission
Control Center – Concentrator
GSM / GPRS modem – through the existing mobile network

Concentrator – UMS
PLC modems – through the existing NN network